but foreign policy is looming large in this campaign. i want to turn to my colleague and our chief foreign current, richard engel live in kabul this morning where there is news beyond the libya crisis. richard i know as you've been covering the warn in afghanistan over the years. there are now 50-plus attacks, insider attacks that have killed american and other coalition forces. what's the latest you could tell us on the latest attack? >>. >> there's been another attack, it took place yesterday, but word of the insider attack is just coming to us today. in this attack, there was an american army checkpoint, a vehicle control point. and two afghan soldiers came up, they were speaking to the americans at this checkpoint and then suddenly, one of these afghan soldiers pulled out a weapon, opened fire. killed one american soldier. killed another american contractor and other americans in the area opened fire, killing at least three of the afghans. and this is a major problem, according to statistics. at least 20% of all u.s. combat deaths th